[PATCHv2 5/5] mmc: sdhci-bcm2835: add sdhci quirk SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12

[Stephen Warren]

On 11/05/2014 12:02 AM, Scott Branden wrote:
> On 14-11-04 09:00 PM, Stephen Warren wrote:
>> On 10/30/2014 12:36 AM, Scott Branden wrote:
>>> SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12 is missing and needed for this
>>> controller.
>>
>> This seems fine, although any explanation of why this quirk is needed
>> would be useful.
>>
> I don't know who to talk to at Arasan about this.  Will try hunting
> around a little for more info as to why this is needed to have eMMC and
> SD work properly through our internal testing on other non-2835 chipset
> that shares the same SDHCI controller as 2835.

I thought I heard that this wasn't a bug in the controller itself, but
rather an integration issue between the IP core and the register bus
it's attached to. Consequently, it may be SoC-specific or at least have
SoC-specific variations?